Looper mechanism for sewing-machines.



GpB. MOLYNEUX.

LOOPER MECHANISM FOR SEWING MACHINES.

APPLICATION FILED 313.23, 1910.

1,127,795., Patented Feb. 9, 1915.

2 SHEETS-SHEET 1.

W/T/V8SE8: lA/I/E/VIOR W 5 ATTORNEY P NORRIS PETERS CO4, FHOTOLITHO-WASHING TON. D. C.

G. E. MOLYNEUX.

LOOPER MECHANISM FOR SEWING MACHINES.

APPLICATION FILED PEB.23. 1910.

1,127,795. Patented Feb. 9, 1915.

2 SVHEETSSHEBT 2.

WITNESSES.

; IIVVENTOR r A roam THE NORRIS PETERS 60.. FHOTO-LITHQ. WASHINGTON. D.c.

iii

1D TAWAENT @FF1@..

GEORGE E. IVIOLYNEUX, OF BAYONNE, NEW JERSEY, ASSIGNOR TO THE SINGERMANU- FACTURING COMPANY, A CORPORATION OF NEW JERSEY.

LOOPER MECHANISM FOR SERVING-MACHINES.

Application filed February 23, 1910.

To aZZ whom it may concern.

Be it known that I, Gnonon E. MOLYNEUX, a citizen of the United States,residing at Bayonne, in the county of Hudson and State of New Jersey,have invented certain new and useful improvements in Looper Mechanismfor Sewinghlachines, of which the following is a specification,reference being had therein to the accompanying drawings.

This invention relates to an improvement in looper-actuating mechanismfor chainstitch sewing machines more particularly of the classconstructed with a cylindrical bed or work-supporting horn and feedingmechanism designed to advance the work longitudinally of the latter,such as is disclosed in my pending application Serial No. 521,801, filedOctober 9, 1909; and it has for its object to provide an effectivesimple and compact mechanism for imparting to the looper its endwiseloop-seizing and sidewise or needle-avoiding movements.

As preferably constructed, the 'loopercarrier is pivotally mounted upona rockshaft WfllCll imparts to the looper through its carrier theendwise loop-seizing and shedding movements, rocking movements beingimparted to the looper-carrier to transmit the sidewise looper movementsby a connection with a jog-bar, slidingly mounted in bearings parallelwith the looper rock-shaft and pivotally connected with one end of agyratory thrust-rod whose opposite end has a pivotal connection with arotary shaft at a point of the latter at one side of its axis ofrotation, which axis is also offset from the point of connection of thethrust-rod with the j og-bar. The rotation of the shaft obviously causesthe thrustrod to assume different angular relations with the jog-bar towhich it thus imparts cndwise jogging movements. A bushing provided withan eccentric bore affords a bearing for the jog-bar, so that thecircular adjustment of the bushing acts to vary the degree in which thejog-bar is offset from the axis of its actuating rotary shaft, therebycorrespondingly adjusting the amplitude of its jogging movements.

In the drawings, Figure 1 is a transverse sectional elevation of theforward portion of the cylinder-bed machine of my said pendingapplication, with the needle and presser-foot and the lower portions oftheir -carrying bars, and Fig. 2 a front end view Specification ofLetters mat."

Patented Feb. 9, 19115.

Serial No. M5345.

of the same with the end-cap of the cylinder-bed removed. Fig. 3 is aperspective view of the looper and its carrier. Fig. 1 IS a plan of theogging means for producing the needleavoiding movements of the looper.Fig. 5 is a perspective view of aportion of the looper-jogging means,and Figs. 6 and 7 sectional side and end elevations of-the bushing forthe jog-bar. Fig. 8 IS an enlarged perspective view, partly in section,representing a member of the looper-jogging mechanism. Fig. 9 is asectional side elevation of a sewing machine embodying certain of thecharacteristic features of the present invention, and representing aslight modification of the looper mechanism; and Fig. 10 is a rear endview of the same with the base and bracket-arm standard in section.

Referring to Figs. 1 to 8 inclusive, the cylinder-bed or worksupportinghorn 1 is provided with the throat-plate 2 and the removable endcap 3housing the looper and its carrier. Mounted axially of the arm 1 in thebearing member 1 thereof is a longitudinally extending looper rock-shaft5 which derives its rocking movements from any suitable actuating means,as for instance those shown in Figs. 9 and 10 of the drawings hereof.The looper-supporting shaft has mounted upon its forward end the splitcollar 6 secured adjustably thereon by means of" the clamp-screws 7passing through spaced lateral ears 8 of said collar. The collar 6 isformed with a forwardly projecting stud 9 of angular cross-section withparallel sides and formed with a transverse fulcrum-pin aperture 10intersected by the axial screw-hole 11.

Pivotally mounted upon the transverse fulcrum-pin 12 passing through theaperture 10 of the stud 9 is the looper-carrier 13 which is formed witha rectangular aperture 1 1 fitted to the sides of and embracing the stud9. The fulcrum-pin 12 is fiatted intermediate its ends at 12 where it isengaged by the point of the set-screw 15 ontering the aperture 11 of thestud 9 to secure the fulcrum-pin against displacement. The loopercomprises the blade 16 formed with the eyes 17 connected by the usualthreadgroove and provided with a shank 18 with angular-1y arrangedportion 19 secured by means of the set-screw 20 within a socket in thecarrier 13. The looper-blade is ar 5 the fulcrum-pin 12 is split in aplane parallel with said pin and provided in its lower portion with asegmental raceway 21 afforded by the lateral wings 22 which are formedwith transverse screw-holes entered by the clamp-screws 23 by which saidwings may be relatively adjusted to take up wear. Arranged within theraceway 21 beneath the axis of the'looper-shaft 5 is a wearingblockcomposed of two separable parts 24 and 25, the former beingprovided with steady pins 26 entering apertures 27 in the latter, andboth being provided with portions of a spherical socket 28 embracing thehead 29 of a ball-stud 30 whose shank is clamped by means of the screw31 in a vertical socket in the forwardly projecting arm 32 of a splitcollar 33 clamped by means of a screw 34 upon the reduced forward end 35of the reciprocating plug or jog-bar 36 arranged parallel with andbeneath the looper rock-shaft 5.

The j og-bar 36 is fitted within the eccentric bore or bearing aperture37 of the cylindrical bushing 38 which is in turn mounted 30 within acylindrical aperture 39 of the bearing member 4 in which thelooper-shaft is journaled. The bushing 38 is adapted to be turned withinits aperture 39 to change the position of the jog-bar 36 laterally, butis normally secured against shifting by engagement with the annularexternal groove 40 therein of the point of a set-screw 41 introducedthrough a transverse aperture 42 in the wall of the horn 1. The bushingis shown in Figs. 6 and 7 provided with an internal annular oil cavity43 and with a longitudinal keyway 44 to receive the spline or feather 45of the j og-bar 36 by which the latter is prevented from turning in the45 quired, the several adjustments above described serving to properlylocate the loopseizing position of the looper point relatively to theneedle, as well as to insure the required lateral throw of the looper inperi forming its needle-avoiding movements.

The rearward end portion of the reciprocating plug or jog-bar 36 isformed with a removable lateral section 46 secured in position 'by meansof the screw 47, and partly within this removable section and partlybushing. As the circular adjustment of the within the adjacent-portionof the jog-bar is axially disposed a spherical socket 48 with a flaringrearwardly extending opening entered by the reduced forward portion ofthe gyratory thrust-rod 49 terminating at its extremity in the ball 50fitted within said cavity. The similarly formed opposite end of thethrust-rod is correspondingly reduced and provided with a ball 51 fittedwithin a similar cavity or socket 52 formed partly in the disk 53 andpartly within a removable peripheral section 54 thereof secured in placeby means of screws 55. i The socket 52 is laterally oflset from thecenter of the disk 53, which latter is fixed upon the forward end of arotary shaft 56 journaled in the bearing member 57 of thework-supporting horn 1. extension of the main-shaft to which power istransmitted from any suitable source.

As herein represented, the machine is provided with a reciprocatingneedle-bar 58 carrying the needle-clamp 59 in which are secured by meansof clamp-screws 60 the shanks of two eye-pointed needles 61 with whichthe single looper cooperates in the production of stitches. The machineis also provided with the usual presser-bar 62 to the reduced lower endof which is secured the shank 63 of the hinged presser-foot 64 normallyresting upon the throat-plate 2 and opposed to the serratedoperativeface This rotary shaft is or may be an of the feed-dog 65 which issecured by means of the screw 66 upon a block 67 at the forward end ofthe longitudinally reciprocating feed-bar 68, which is formed with anecked portion 69 fitted within the tilting bearing sleeve 70 which isin turn pivotally mounted by means of center-screws 71 upon the yokedupper end of the post or standard 72 provided at its lower end with astrap 73 embracing a feed-lifting eccentric 74 whose hub 75 is securedby means of set-screws 76 upon the rotary shaft 56. It will thus be seenthat the feed-dog 65 has feeding movements longitudinally of thework-supporting horn transversely of the endwise loopseizing movementsof the looper-blade 16, being prevented from lateral movement by meansofa guideway 4 of the bearing member 4 in which the sides of the block 67are fitted and the feed dog is supported by and receives its rising andfalling movements from the eccentric 74 upon :the rotary ,bar 58 and thepresser-bar 62. The base has the rearward bearing-boss 77 containing thebushing 78 in which is journaled the rear end of the main-shaft 56fitted within the bearing member 7 9 at the rearward end of thecylindrical-bed 1.

The bracket-arm is provided at its rearward end with a bearing-boss 80in which is journaled the rearward end of the needleactuating rock-shaft81 whose forward end is fitted to and passes through the bearing member82 into the cavity of the head of the bracket-arm, where it is providedwith the usual crank-arm 88 carrying a pin 8-1 connected by means of thepitman 85 with a lateral pin upon the collar 86 fixed upon theneedle-bar 58. Upon the rearward end of the rock-shaft 81 is fixed thelateral rankarm 87 which carries the stud 88 embraced by the upper endof a pitman 89 whose lower end embraces a crank 90 formed in themain-shaft 56 and adapted to communicate through the describedconnecting mechanism reciprocating movements to the needle-bar andneedles."

The needle-actuatingrock-shaft has fixed thereon, at the opposite sideof the bearingboss 80 from the crank-arm 87, a second lateral crank-arm91 carrying a screw-stud 92 embraced by the upper end of the pitman-rod93 whose lower end embraces a screw-stud 9t intermediate the ends of avibrating'lever 95 having one end journaled upon the fixed fulcrum-pin96 sustained by a lug 96 upon the base 1*. The outer end of the lever 95carries a screw-pin 97 connected by means of a link 98 with a similarpin 99 carried by a crank-arm 100 fixed upon the rearward end of thelooper rock-shaft 5,

The component members of the operative connections between the needleactuating and looper rock-shafts are so arranged and proportioned thatthe rocking of the former through its crank-and-pitman connectionsblade.

with the actuating crank 90 of the mainshaft causes the screw-pin 97 tomove into and out of alinement with the fulcrum-pin 96 and crank-pin 99of the crank-arm 100 in imparting each complete reciprocation of theneedle, whereby the looper rock-shaft receives a dwell in the productionof each stitch as the needles attain their highest position and begintheir descent for a succeeding stitch.

As represented in Fig. 9, the looper derives its operative endwiseloop-seizing and shedding movements from its supporting rock-shaft 5,and its sidewise or needleavoiding movements are imparted to it by meansof an actuating cam 101 secured upon the forward end of the reducedforward portion of the main-shaft 56 and provided with a peripheralcam-groove 102 entered. by the roller-stud 103 upon the forwardprojecting arm 104 of a collar 105 secured by means of the set-screw 106upon the rearward end of the jog-bar 36 connected with thelooper-carrier as described in connection with the preceding figures.

In both of the described forms of the improvement, the movements of thejogbar 36 are so timed that while the needle is appreaching andbeginning its recession from its highest position, and the looper is onthe dwell of its endwise travel, a sidewise needle-avoiding movementtakes place simultaneously with and in opposition to the operativework-advancing movement of the feeddog, thereby insuring the drawing ofthe looperthread taut preparatory to the descent of the needles withinthe distended looper-thread loop leading from the needlehole in thethroat-plate to the looper-eye and thence backwardly along the looper-In practice,,any usual or suitable mechanism may be employed formanipulating the looper-thread and taking up slack in the samepreparatory to the descent of the needles, but the described reciprocalmove ments of the looper and the work preparatory to the descent of theneedles insures against the catching of the looper-thread upon theneedle points or the skipping of stitches.

As will be seen by reference more particularly to Fig. 4, the sphericalend 51 of the gyratory thrust-rod 49 moves in a circular path which isdivided by the horizontal plane of the axis of the jog-bar 36 intolonger and shorter arcs. The operative reciprocatory movements of theog-bar are performed during the traverse of the tremity 51 of the member49 in the longer of these arcs and mainly in the travel toward and fromthe portion thereof farthest from said plane. As the direction of movement of the thrust-rod extremity 51 in the smaller arc is nearlyparallel with said plane, the slight endwise retractive move menttransmitted by the thrust-rod to the jog-bar is practicallyinappreciable during; suchitraverse and a dwell is produced in therocking movement of the looper-carrier. A similar condition exists, butin less degree because of the inclination of the thrust-rod, when thespherical extremity 51 of the latter moves through the portion of thelarger arc farthest removed from the plane referred to, therebyproducing another dwell. While in theory this accelerated-motionmechanism does not entirely interruptthe rocking movements of thelooper-carrier upon its pivotal supporting pin 12, in practice thesements alternately the looper is caused to.

move in a path which is not elliptical, as hasv been usual heretofore,but in a substantially rectangular path, whereby the looper is permittedto move in substantially parallel planes upon opposite sides oftheneedlepaths in performing its loop -seizing and loop-sheddingmovements so as to cooperate with precision with the two needlesarranged side-by-side, while it is permitted tomove in a substantiallyshort path and its length is correspondingly short as compared with thatof loopers heretofore employedin this class of mechanism. The sidewisemovements of the looper are therefore interrupted during the initialadvance and receding endwise movements for seizure of the needlesthreadloops and presentation of loopsof its thread for entrance of theneedles. The looper is thus caused .to cooperate with equal precisionwith each of the spaced needles in amanner which has not been attainedheretofore with a looper moving in a substantially elliptical path in,which its blade moves at different distances from the spaced needleswith which it cooperates. I Q 7 As will be seen by reference to Figs.1,, 2 and 9, the looper rockshaft is mounted concentrically with thecylinder-bed, so that the endwise movements of the looper-blade,

which is formed concentrically therewith, arein a circular arc, and thecylinder-bed maytherefore be made of minimum size for housing itsseveral operative parts without extra clearance to accommodate thelooper movements. The pivotal support of the looper-carrier intermediateits upper and lower ends also and the connection of its joggingmechanism therewithv below said supportproduces a balance of theloop-taking member which is conducive to the high speed for which themachine is'designed, without noise and excessive wear of the parts. v

The rearward end of the feed-bar 68 carries a strap 6S embracing aball-stud 107 upon alateral arm 108 of a rocking sleeve 109 mounted upona vertical fulcrum-stud 110 and provided with a lateral arm lll have inga suitable .pitman connection, including the strap 112, with theactuating eccentric 113 upon the mainshaft. r

Sub-

The thread-controlling parts are in practice so timed that theneedle-threads are slackened as the needles begin to descend until theireyes have passed, beneath the work, but are thereafterdrawn up; and theI preceding stitches are finally set as the needles reach their lowestposition, the lower thread being slackat this time to permitthelower-thread loop to be readily drawn into place beneath the fabric. Asthe needles begin to rise to present their loops to the looper, theneedle-threads are again slackened while their loops are enof the looperis completed simultaneously with the feeding action for advancing thework just as the needles assume their extreme upper positions and thelooper its an treme advance position with the needlethread loops uponits blade. As the needles descend with their points about to enter thework, the looper begins its retro.- grade or loop-shedding movement-withits thread maintained taut until the points of the needles descend belowt'he looper-thread intermediate the needle-holes of the throatplate andthe eye in the looper point. lVhile the needles are descending toextremelower position, the looper continues its retrograde movement until its,point is beyond the farthest needle, when the quicksidewise 0rneedle-avoiding movement takes place so as to bring the loop. of theneedle-thread from i the looper point directly to the needle-hole,

when the arrival of the needles at extreme lower position effects thesetting of the stitch and the drawing. of suflicient looper thread forthe purpose freelyvthrough the looper from the lower thread-supply. Asthe needles begin to rise, the looper commences its advance orloop-seizing movement, which is completed as the needles reach theirextremeupper positions.

It is evident that other means than those disclosed herein may bereadily devised for varying'the degree of operative movement of thegyratory thrust-rod 49 without departing from thepresent invention. Itis also evident that the present improvement is susceptible ofconsiderable modification in other respects without departure from thescope of the invention. 1

Having thus set forth the nature of the i standard and through a portionof the length of said work-supporting arm, and a reciprocating needle,of a rock-shaft mounted within and in axial relation with saidwork-supporting arm, a l0oper-carrier having a transverse pivotalconnection with and supported upon said rockshaft, a looper mounted insaid looper-carrier with its blade disposed transversely of said shaft,means connected with said rotary shaft within the hollow standard foractuating said rock shaft, a reciprocating member disposed within thework-supporting arm in advance of and substantially parallel with saidrotary shaft, an operative connection between said reciprocating memberand the rotary shaft, and a connection between said reciprocating memberand the looper-carrier ,for rocking the latter upon its supportingrock-shaft.

2. In a sewing machine, the combination with a reciprocating needle, ofa rock-shaft mounted in fixed bearings, a looper-carrier having atransverse pivotal connection therewith by which it is supported thereonand provided with a segmental raceway, a looper mounted in saidlooper-carrier with its blade disposed transversely of said shaft, meansfor rocking said shaft, and means, including a reciprocating rodparallel with said shaft and provided with a stud entering the racewayof said looper-carrier, for rocking said looper upon said shaft.

3. In a sewing machine, the combination with the frame constructed witha cylindrical work-supporting arm, and a reciprocating needle, of arotary shaft and a loopersupporting rock-shaft substantially paralleltherewith mounted within and longitudinally of said arm, an eyed loopermounted on said rock-shaft, a feed-bar mounted within and longitudinallyof said arm and carrying a feed-dog, independent connections betweensaid feed-bar and said rotary shaft disposed respectively within andexterior to said arm for imparting endwise and vibratory movements tothe feed-bar, a con nection between the looper-supporting shaft and saidrotary shaft exterior to said arm for imparting loop-seizing movementsto the looper, and a connection between said shaft and the looperarranged within said arm and independent of the looper-supporting shaftconnection for imparting sidewise or needleavoiding movements to thelooper.

a. In a sewing machine, the combination with a reciprocating needle, ofa rock-shaft, a looper-carrier fulcrumed thereon and provided with asegmental raceway transverse to said shaft, a looper mounted in saidloopercarrier, a rotary shaft parallel with said rock-shaft, areciprocating bar also parallel with said rock-shaft, an actuatingconnection between said rotary shaft and reciproeating bar, a socketedWearing block fitted to the raceway in said looper-carrier, and aball-stud carried by said reciprocating bar and fitted within the socketof said Wearing block.

In a sewing machine, the combination with a reciprocating needle, of arock-shaft, a looper-carrier fulcrumed thereon and provided with alongitudinally split segmental raceway and means to adjust the sidewalls of said raceway relative to each other, a looper mounted in saidlooper-carrier, a rotary shaft parallel with said rock-shaft, areciprocating bar also parallel with said rock-shaft, an actuatingconnection between said rotary shaft and reciprocating bar, a soclretedwearing block fitted to the raceway in said looper-carrier, and aball-stud carried by said reciprocating rod and fitted within the socketof said wearing block.

6. In a sewing machine, the combination with a cylinder-bed or horn, ofa reciprocating needle-bar provided with a needle, 2. rock-shaftjournaled within and longitudinally of said cylinder-bed or horn, aloopercarrier movably mounted upon and adjustable both circularly andlongitudinally of the same, means for imparting sidewise movements tosaid looper upon and relative to its supporting shaft, and a cap appliedto the extremity of said cylinder-bed or horn and housing said looperwithin the same.

7. In a sewing machine, the combination with a reciprocating needle, ofa rockshaft, a collar mounted upon said rock-shaft and provided with anangular portion having parallel sides, a looper-carrier apertured toembrace the angular portion of said collar, a pivotal pin extendedthrough the loopercarrier and collar transversely of the latter, alooper mounted in said looper-carrier above its pivotal pin, and meansconnected with the looper-carrier below said pivotal pin{ for rockingsaid looper on the rocksha 't.

8. In a sewing machine, the combination with the frame comprising acylindrical work-supporting arm, of a needle, a looper, alooper-carrier, a movable support for said carrier disposed within andlongitudinally of said arm and adapted to transmit operative movementsin one direction to the looper, and upon which support the loopercarrieris movably mounted, ajogging memher, an operative connection betweensaid jogging member and the looper-carrier whereby movements areimparted to the looper transversely of those first-named, a rotary shaftdisposed within and longitudinally of the work-supporting arm, and athrust-rod pivotally connected at its ends respectively with saidjogging member and the rotary shaft at points offset from the axis ofthe latter.

9. In a sewing machine, the combination with a needle, of a looperhaving a blade, a

looper-carrier upon which the same is mounted, a supporting rock-shaft,a fulcrum-pin for said looper-carrier sustained upon the rock-shafttransversely of its axis in a plane parallel with the looper-blade, ajog-bar, an operative connection between said jog-bar and thelooper-carrier for imparting to the latter rocking movements upon itsfulcrum-pin, a rotary shaft parallel with the rock-shaft, and athrust-rod connected at the ends respectively with said barandsaid shaftat points onset from the latters axis.

10. In a sewing machine, the combination with a needle, of a looperhaving a blade, a looper-carrier upon which the same is mounted, asupporting rock-shaft, a fulcrum-pin for said looper-carrier sustainedupon the rock-shaft transversely of its axis in a plane parallel withthe looper-blade, a jog-bar, a bearingfor said jog-bar affording meansfor lateral adjustment thereof, an operative connection betweensaidjog-bar and the looper-carrier for imparting to the latter; rockingmovements upon its fulcrumpin, a rotary shaft parallel with therockshaft and in eccentric relation to the jogbar, and a thrust-rodconnected at the ends respectively with said bar and said shaft atpoints offset from the latters axis.

ll. Ina sewing machine, the combination with a needle, of a looperhaving a blade, a looper-carrier upon which the same is mounted, asupporting rock-shaft, a fulcrum-pin for said looper-carrier sustaineduponthe rock-shaft transversely of its axis in a plane parallel with thelooper-blade, a

' jog-bar, a bushing mounted for circular adjustment within a fixedsupport and provided with an eccentric bearing aperture to which said jog-bar is slidingly fitted, an operative connection between said jog-barand the looper-carrier for imparting to the latter rocking movementsupon its fulcrumpin, a rotary shaft parallel with the rockshaft, and athrustrod connected at the ends respectively with said bar and saidshaft at points offset fromthe latters axis.

12. In. a sewing machine, the combination with the frame comprising acylindrical worlr-supporting arm, of a needle, a looper, alooper-carrier, a movable support for said carrier disposed within andlongitudinally of said arm and adapted to transmit operative movementsin one direction to the looper, and upon which support the loopercarrieris movably mounted, a Jogging member, an operative connection betweensaid jogging member and the looper-carrier whereby movements areimparted to the looper transversely of those first-named, a rotary shaftdisposed within andlongitudinally of the work-supporting arm, athrustrod pivotally connected at its ends respectively With said joggingmember and the rotary shaft atpoints offset from the axis.

of the latter, a feed-dog, a feed-bar movable longitudinally of thework-supporting arm, and a support for said feed-bar sustained upon saidshaft.

13 In a sewing machine, the combination with the frame comprising acylindrical work-supporting arm, of a needle, alooper, a looper-carrier,a movable support for said carrier disposed within and longitudinally ofsaid arm and adapted to transmit opera-v tive movements in one directionto the looper, and upon which support the loopercarrier is movablymounted, a jogging memher, an operative connection between said joggingmember and the looper-carrier whereby movements are imparted to thelooper transversely of those first-named, a rotary shaft disposed withinandlongitudinally of the work-supporting arm, a thrustrod pivotally'connected at its ends respectively with said jogging member and therotary shaft at points offset from the axis of the latter, a feed-clog,a feed-bar movable longitudinally of the work-supporting arm, afeed-lifting eccentric upon said shaft, and a feed-bar support providedwith a strap embracing said eccentric.

14. In a sewing machine, the combination pendent of said rocking meansfor rocking the looper-carrier upon its pivotal connection with saidshaft.

15. In a sewing machine, the combination with a reciprocating needle, ofa rock-shaft mounted in fixed bearings, a looper-carrier having atransverse pivotal connection with and supported by said rock-shaft, aneyed looper mounted in said looper-carrier with its blade disposedtransversely of said shaft, actuating mechanism for said roclcshaftincluding means for producing a dwell thereof in extreme position, andactuating mechanism for rocking the looper-carrier upon its'pivotalconnection with said shaft including means for producing a dwell of thelooper-carrier in extreme position, said actuating means being timed tooperate alternately.

16. A looper mechanism including in combination a rotating shaft, arocking loopersupport substantially parallel with said shaft, a loopercarried thereby, means for giving said looper a loop-taking movementcrosswise of said shaft, and means for givmg said looper a sldewlse orneedle-avoiding movement endwise of said shaft, said lastnamed meansincluding a member carried at the outer end of said shaft, a linkinclined to the axis of said shaft and having a universal-jointconnection with said member at a point at one side of the axis of saidshaft, and. means for connecting the outer end of said link to saidlcoper at a point at one side of the axis of said shaft, whereby saidlink will'be given a gyratory and endwise movement and thereby impartthe sidewise movement to said looper.

17. A sewing machine including, in combination, av work-support, arotating shaft extending longitudinally of said work-support, alooper-support substantially:parallel with said shaft, a looper mountedthereon between the end of said shaft and the end of the work-support,means for giving said looper a loop-taking movement in a directiontransversely of said work-support, and means for giving said looper asidewise or needleavoiding movement longitudinally of said work-support,said last named means including a member carried at the end of saidshaft, a link inclined to the axis of said shaft and having auniversal-joint connection with said member at a point at one side ofthe axis of said shaft, and means for connecting the outer end of saidlink to-the said looper, the outer end of said link being disposed atone side of the axis of said shaft, whereby said link will be given agyratory and endwise movement and thereby impart the sidewise movementto Said looper.

18. In a sewing machine, a laterally closed casing, two parallel shaftsextending longitudinally thereof, a" loopersustained upon and derivingrocking movements from and crosswise ofone of said shafts in advance ofthe extremity of the other, a crank element carried by the extremity ofthe other shaft, and a pitman attached at one end to said crank elementand having its other end connected with said looper and confined to apath of movement at one side of the axis of the second-named shaft,whereby movements lengthwise of said shafts are imparted to said looper.

19. In a sewing machine, the combination with the frame constructed witha cylindrical work-supporting arm, and a reciprocating needle, of arotary shaft journaled within and extending longitudinally of said arm,a rock-shaft mounted in fixed bearings within said arm parallel withsaid rotary shaft, a looper mounted upon said rockshaft with its bladedisposed transversely thereto and movable endwise of said shaft, meansfor imparting operative movements to said rock-shaft, and means forimparting to the looper movements in a direction crosswise of its bladeand comprising a crank fixed upon said rotary shaft, a reciprocatoryelement connected with said looper, and a link having at one end auniversal joint connection with said crank and at the other end aconnection with said reciprocatory element disposed eccentrically to theaxis of said rotary shaft. 7

20. In a sewing machine, in combination, a rotary shaft, a reciprocatingneedle, a. rockshaft, a looper mounted thereon, actuating meansconnected with said rotary shaft wheeby operative loop-taking movementsare imparted to the looper, means connected with the looperindependently of Said rockshaft and of said actuating means forimparting sidewise or needle-avoiding movements to the looper, and meansfor varying the amplitude of said sidewise movements.

21. In a sewing machine, in combination, a rotary shaft a reciprocatingneedle, a rockshaft, a looper mounted thereon, actuating means connectedwith said rotary shaft whereby operative loop-taking movements areimparted to the looper, and means for imparting to the looper sidewiseneedleavoiding movements and comprising a rectilinearly reciprocatingrod operatively connected with the looper independently of saidactuating means, an operative connec tion between said rod and therotary shaft, and adjusting means whereby the action of said connectionupon the reciprocating rod may be changed.

In testimony whereof, I have. signed my name to this specification, inthe presence of two subscribing witnesses.

GEORGE MQLYNEUX.

Witnesses 7' HENRY J. MILLER, H. A. KoRNEMANN, Jr.

Copies of this patent may be obtained for five cents each, byaddressingthe Commissioner of Patents,

Washington, C.

